Examples of BatchGetItemRequest

com.amazonaws.services.dynamodb.model.BatchGetItemRequest
Container for the parameters to the {@link com.amazonaws.services.dynamodb.AmazonDynamoDB#batchGetItem(BatchGetItemRequest) BatchGetItem operation}.
Retrieves the attributes for multiple items from multiple tables using their primary keys.

The maximum number of item attributes that can be retrieved for a single operation is 100. Also, the number of items retrieved is constrained by a 1 MB the size limit. If the response size limit is exceeded or a partial result is returned due to an internal processing failure, Amazon DynamoDB returns an UnprocessedKeys value so you can retry the operation starting with the next item to get.

Amazon DynamoDB automatically adjusts the number of items returned per page to enforce this limit. For example, even if you ask to retrieve 100 items, but each individual item is 50k in size, the system returns 20 items and an appropriate UnprocessedKeys value so you can get the next page of results. If necessary, your application needs its own logic to assemble the pages of results into one set.
@see com.amazonaws.services.dynamodb.AmazonDynamoDB#batchGetItem(BatchGetItemRequest)
com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest
aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithDDTables.html#CapacityUnitCalculations"> Capacity Units Calculations in the Amazon DynamoDB Developer Guide.
@see com.amazonaws.services.dynamodbv2.AmazonDynamoDB#batchGetItem(BatchGetItemRequest)

Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

    private void processBatchGetRequest(Map<String, Class<?>> classesByTableName,
                                        Map<String, KeysAndAttributes> requestItems,
                                        Map<String, List<Object>> resultSet) {


        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

import com.fasterxml.jackson.core.JsonToken;


public class BatchGetItemRequestJsonUnmarshaller implements Unmarshaller<BatchGetItemRequest, JsonUnmarshallerContext> {


    public BatchGetItemRequest unmarshall(JsonUnmarshallerContext context) throws Exception {
        BatchGetItemRequest request = new BatchGetItemRequest();


        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;


        JsonToken token = context.currentToken;
        if (token == null) token = context.nextToken();


       while (true) {
            if (token == null) break;
            if (token == JsonToken.FIELD_NAME || token == JsonToken.START_OBJECT) {
                if (context.testExpression("RequestItems", targetDepth)) {
                    request.setRequestItems(new MapUnmarshaller<String, KeysAndAttributes>(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance(), KeysAndAttributesJsonUnmarshaller.getInstance()).unmarshall(context));
                }
            } else if (token == JsonToken.END_ARRAY || token == JsonToken.END_OBJECT) {
                if (context.getCurrentDepth() <= originalDepth) break;
            }
            token = context.nextToken();

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

    }


  @Test
  public void vanillaBatchGetItemTest() throws Exception {
        this.vanillaBatchWriteItemTest();
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        Map<String, KeysAndAttributes> requestItems = new HashMap<String, KeysAndAttributes>();


        KeysAndAttributes keysAndAttributes1 = new KeysAndAttributes();
        List<Map<String, AttributeValue>> itemKeys1 = new ArrayList<Map<String, AttributeValue>>();
        itemKeys1.add(createItemKey(hashKeyName1, new AttributeValue().withN("6")));
        keysAndAttributes1.setKeys(itemKeys1);
        List<String> attributesToGet1 = new ArrayList<String>();
        attributesToGet1.add(hashKeyName1);
        keysAndAttributes1.setAttributesToGet(attributesToGet1);


        KeysAndAttributes keysAndAttributes2 = new KeysAndAttributes();
        List<Map<String, AttributeValue>> itemKeys2 = new ArrayList<Map<String, AttributeValue>>();
        itemKeys2.add(createItemKey(hashKeyName2, new AttributeValue().withN("1")));
        keysAndAttributes2.setKeys(itemKeys2);
        List<String> attributesToGet2 = new ArrayList<String>();
        attributesToGet2.add(hashKeyName2);
        keysAndAttributes2.setAttributesToGet(attributesToGet2);
        //Test case 1: Every request has matches.
//        keys.add(new Key(new AttributeValue("4")));
//        keys.add(new Key(new AttributeValue("5")));
//        keys.add(new Key(new AttributeValue("3")));


        //Test case 2: Requests has no match.


        //Test case 3: Complicated test, some requests has matches, some doesn't.
//        keys.add(new Key(new AttributeValue("7")));
//        keys.add(new Key(new AttributeValue("4")));


        //Test case 4: Duplicated request
        //Duplicated requests return duplicated results.
//        keys.add(new Key(new AttributeValue("7")));
//        keys.add(new Key(new AttributeValue("7")));
//        keys.add(new Key(new AttributeValue("4")));
//        keys.add(new Key(new AttributeValue("4")));


        //Test case for Exception: Table doesn't exist.
//        requestItems.put("Vito's Table", keysAndAttributes);


        // Normal test
        // TODO: Multi table test failed. Need to be fixed.
        requestItems.put(tableName1, keysAndAttributes1);
        requestItems.put(tableName2, keysAndAttributes2);


        batchGetItemRequest.withRequestItems(requestItems);
    BatchGetItemResult result  = getClient().batchGetItem(batchGetItemRequest);
        junit.framework.Assert.assertNotNull("UnprocessedKeys should be empty rather than null.", result.getUnprocessedKeys());
  }

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

            final Map<String, KeysAndAttributes> requestItems,
            final Map<String, List<Object>> resultSet,
            final DynamoDBMapperConfig config) {


        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest()
            .withRequestMetricCollector(config.getRequestMetricCollector());
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

            final Map<String, KeysAndAttributes> requestItems,
            final Map<String, List<Object>> resultSet,
            final DynamoDBMapperConfig config) {


        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest()
            .withRequestMetricCollector(config.getRequestMetricCollector());
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

  private <P extends ParaObject> void batchGet(Map<String, KeysAndAttributes> kna, Map<String, P> results) {
    if (kna == null || kna.isEmpty() || results == null) {
      return;
    }
    try {
      BatchGetItemResult result = client().batchGetItem(new BatchGetItemRequest().
          withReturnConsumedCapacity(ReturnConsumedCapacity.TOTAL).withRequestItems(kna));
      if (result == null) {
        return;
      }

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

    private void processBatchGetRequest(Map<String, Class<?>> classesByTableName,
                                        Map<String, KeysAndAttributes> requestItems,
                                        Map<String, List<Object>> resultSet) {
        
        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

    private void processBatchGetRequest(Map<String, Class<?>> classesByTableName,
                                        Map<String, KeysAndAttributes> requestItems,
                                        Map<String, List<Object>> resultSet) {


        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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Examples of com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest

    private void processBatchGetRequest(Map<String, Class<?>> classesByTableName,
                                        Map<String, KeysAndAttributes> requestItems,
                                        Map<String, List<Object>> resultSet) {
        
        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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